Dell Latitude C840 - Manual (Page 33)

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System Board
Dell™ Latitude™ C840 Service Manual
The BIOS chip on the system board contains the service tag sequence, which is also visible on a bar code label on the bottom of the computer.
The replacement kit for the system board includes a floppy disk or CD that provides a utility for transferring the service tag sequence to the replacement
system board.
Removing the System Board
1. Follow the instructions in " Preparing to Work Inside the Computer ."
2. Remove the hard drive and the fixed optical drive .
3. Remove any installed Mini PCI Cards .
4. If migrating the memory, remove all installed memory modules .
5. Remove (if migrating) or disconnect the modem daughter card .
6. Remove the keyboard.
7. Remove the hinge cover .
8. Remove the display assembly .
9. Remove the palm rest .
10. Remove the video graphics board .
11. Remove the microprocessor thermal-cooling assembly .
12. If migrating the microprocessor, remove the microprocessor module .
NOTICE: Disconnect the computer and attached devices from electrical outlets and remove any installed batteries.
NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by periodically touching unpainted metal on the computer.
1 M2.5 x 4-mm captive-
washer screws (3)
2 system board
3 network connector
4 modem connector
5 network cable cover
6 M2.5 x 20-mm screw
NOTICE: If you received a flash BIOS update floppy disk or CD with the replacement microprocessor, you must update the BIOS after replacing the
microprocessor module.